RVVILogger Module to RVVI TEXT format for coverage

[SadhviNarayanan]

This is the rvvilogger module to convert rvvitrace interface data into rvvitext format, so we can get coverage from Wally. I have also attached a sample objdump and rvvitext output, and the rvvitext document passes the python script.

Sm_rvvi_trace.txt
Sm.txt

[jordancarlin]

This is still marked as a draft. Is it ready for a review?

[davidharrishmc]

@jordancarlin ping

[jordancarlin]

Sorry for the delay in reviewing! Can you please update to version 0.3 of the RVVI-Text spec (I don't recall how that differs from what you have here, but you list the version as 0.1). Once it's updated, I'll put this at the top of my list to review.

[Copilot]

Pull request overview

This PR introduces a new rvviTextLogger module that converts data from the RVVI-TRACE interface (rvviTrace) into RVVI-TEXT format, intended for use with functional coverage tools. It is instantiated alongside the existing wallyTracer inside the ENABLE_RVVI_TRACE guard in testbench.sv. The module writes a conforming RVVI-TEXT header and one trace line per retired instruction, capturing PC, instruction encoding, GPR/FPR/vector/CSR state changes, mode transitions, interrupts, and halts.

Changes:

• New file testbench/common/rvviTextLogger.sv: Full implementation of the RVVI-TEXT serialiser module.
• testbench/testbench.sv: Instantiation of rvviTextLogger connected to the shared rvvi interface.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 9 comments.

File	Description
testbench/common/rvviTextLogger.sv	New module that reads from the rvviTrace interface and writes a standards-compliant RVVI-TEXT trace file
testbench/testbench.sv	Adds rvviTextLogger instantiation under ENABLE_RVVI_TRACE guard, connected to the existing rvvi interface

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 5 comments.

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[jordancarlin]

First pass of comments. Many of the Copilot comments are also valid, so please address those too and then let me know when you are ready for another review.

[davidharrishmc]

Is this close to ready?